Pillow (plummer) block ball bearing units consist of an insert bearing mounted in a cast iron housing that can be bolted to a support surface. This variant is suitable for high temperature applications, and for both constant and alternating directions of rotation. It has an inner ring extended on both sides and is locked onto the shaft by tightening a set screw on the inner ring, making it easy to mount.
| Running in required |
Yes
|
| d |
19.05 mm
|
Shaft diameter |
|---|---|---|
| d1 |
≈ 28.2 mm
|
Shoulder diameter inner ring |
| A |
32 mm
|
Base width |
| A1 |
21 mm
|
Top width |
| B |
31 mm
|
Width inner ring |
| B4 |
4.5 mm
|
Distance from locking device side face to thread centre |
| H |
33.3 mm
|
Spherical seat centre height |
| H1 |
14 mm
|
Step height |
| H2 |
64.5 mm
|
Overall height |
| J |
97 mm
|
Distance between attachment bolts |
| J |
min. 88 mm
|
Minimum distance between attachment bolts |
| J |
max. 106 mm
|
Maximum distance between attachment bolts |
| L |
127 mm
|
Overall width |
| N |
11.5 mm
|
Width of attachment bolt hole |
| N1 |
20.5 mm
|
Length of attachment bolt hole |
| s1 |
18.3 mm
|
Distance from locking device side face to raceway centre |
| Basic dynamic load rating | C |
12.7 kN
|
|---|---|---|
| Basic static load rating | C0 |
6.55 kN
|
| Limiting speed |
130 r/min
|
|
| Operating temperature | T |
max. 250 °C
|
| Mass bearing unit |
0.57 kg
|
| Set screw | G2 |
1/4-28 UNF
|
|---|---|---|
| Hexagonal key size for set screw |
3.175 mm
|
|
| Recommended tightening torque for set screw |
4 N·m
|
|
| Attachment bolts, recommended metric size | G |
10 mm
|
| Attachment bolts, recommended inch size | G |
0.375 in
|
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